Subaru IMPREZA GD 2007 Series Manual page 3207

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ABS (DIAGNOSTICS)
Step
9 CHECK GROUND SHORT OF HARNESS.
Measure the resistance between the driver's
control center differential control module con-
nector and chassis ground.
Connector & terminal
(B380) No. 11 — Chassis ground:
10 CHECK YAW RATE & LATERAL G SENSOR.
1) Remove the console box.
2) Remove the yaw rate & lateral G sensor
from vehicle.
3) Connect the connector to the yaw rate & lat-
eral G sensor.
4) Connect the connector to ABSCM&H/U.
5) Turn the ignition switch to ON.
6) Measure the voltage between yaw rate &
lateral G sensor connector terminals.
Connector & terminal
(B230) No. 5 (+) — (B230) No. 6 (–):
11 CHECK YAW RATE & LATERAL G SENSOR.
Measure the voltage between yaw rate & lateral
G sensor connector terminals.
Connector & terminal
(B230) No. 5 (+) — (B230) No. 6 (–):
12 CHECK YAW RATE & LATERAL G SENSOR.
Measure the voltage between yaw rate & lateral
G sensor connector terminals.
Connector & terminal
(B230) No. 5 (+) — (B230) No. 6 (–):
13 CHECK ABSCM&H/U.
1) Turn the ignition switch to OFF.
2) Connect all connectors.
3) Erase the memory.
4) Perform the Inspection Mode.
5) Read the DTC.
14 CHECK OTHER DTC DETECTION.
Check
Is the resistance 1 MΩ or
more?
Is the voltage 2.1 — 2.5 V when
yaw rate & lateral G sensor is in
horizontal position?
Is the voltage 3.3 — 3.7 V when
yaw rate & lateral G sensor is
inclined 90° to the right?
Is the voltage 0.5 — 0.9 V when
yaw rate & lateral G sensor is
inclined 90° to the left?
Is the same DTC still output?
Is there any other DTC
detected?
ABS(diag)-78
Yes No
Go to step 10. Repair the harness
between yaw rate
& lateral G sensor
and driver's control
center differential
control module.
Replace the
driver's control
center differential
control module.
<Ref. to 6MT-125,
Driver's Control
Center Differential
Control Module.>
Go to step 11. Replace the yaw
rate & lateral G
sensor. <Ref. to
6MT-124, Yaw
Rate and Lateral G
Sensor.>
Go to step 12.
Replace the yaw
rate & lateral G
sensor. <Ref. to
6MT-124, Yaw
Rate and Lateral G
Sensor.>
Go to step 13. Replace the yaw
rate & lateral G
sensor. <Ref. to
6MT-124, Yaw
Rate and Lateral G
Sensor.>
Replace the Go to step 14.
ABSCM. <Ref. to
ABS-6, ABS Con-
trol Module and
Hydraulic Control
Unit (ABSCM&H/
U).>
Perform the diag- Temporary poor
nosis according to contact occurs.
DTC.